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Old 09-22-2021, 09:16 PM   #1
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2018 Interstate Grand Tour Ext
San Diego , CA
Join Date: Jun 2020
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spin welded sprayer

can i replace a spin welded sprayer with a glued one on my black water tank of my 2018 airstream interstate grand tour. mine cracked at the inlet fitting likely because it was overtightened when installed. thanks for your help
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Old 09-23-2021, 07:52 AM   #2
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1973 21' Globetrotter
Houston , Texas
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Posts: 3,047
First thing to do is figure out what the tank is made of. Likely it is ABS or HDPE. Since you have a spin welded fitting, it is likely a thermoplastic like HDPE, and not very much sticks to that.

There are a few threads on these forums that deal with tank repairs, try searching for "tank repair" and you should get some hits. I recall one respondent saying they found a glue that would adhere to HDPE.

If you have clear access to the broken fitting, you might try just cutting the broken piece off flush with the tank, and spin-welding a new one on top of it.

good luck!
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Old 09-23-2021, 09:10 AM   #3
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2007 30' Classic S/O
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I used similar product on a few strange jobs and it worked. Two part epoxy putty.

Might be worth a try.
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